Analytical Study of Model Rubberized Concrete Base Isolation System for Buildings in developing Countries
Journal Title: IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) - Year 2018, Vol 15, Issue 1
Abstract
Materials which improve damping and ductility during structural response to earthquakes are very beneficial. Concrete incorporating scrap rubber is one of them. This study analyseddynamicresponse of a 3- bay,4-storey reinforced concrete frame designed according to Eurocode 8 and the response of the same frame on an FRP-confined rubberized concrete foundation. Using confined rubberized concrete as short foundation columns between the ground and the frame lowered shear demand on a structure by 70%, and acceleration demand was reduced by 75 %. The reduction in seismic demand was mainly due to deflection of the earthquake force by the deformable foundation system in a manner analogous to base isolation systems.The base-isolated frame performed efficiently with an average of over 60% reduction in interstorey drifts. The implication of this is that a less expensive frame designed according to the provisions of Eurocode-2 can perform satisfactorily if founded on FRP-confined rubberized concrete columns foundation system.The reduction in force demand on the structure implies lesser material for the superstructure which implies lesser cost of shelter.The proposed deformable system from FRP-confined rubberized concrete is not only cheap, simple to construct with a little technical know-how, but is also environmentally friendly. With the current challenges in providing good quality shelter in earthquake-prone, developing countries, providing concrete which is not only cheaper but with enhanced dynamic properties, will go a long way to provide safe structures for humanity. Apart from this, recycling scrap tyre rubber to be used as aggregates in the production of concrete for structural applications will in no small measure result in a cleaner and sustainable environment.
Authors and Affiliations
Emmanuel Owoichoechi Momoh
Keywords
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- DOI 10.9790/1684-1501023046.
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